ゆふいん泰葉
Yufuin Yasuha SpringOperated by · 有限会社 ゆふいん泰葉
塩
Chloride
+ Bicarbonate
- Color
- colorless and clear
- Taste
- almost tasteless
- Odor
- almost odorless
Sodium Chloride-Carbonate spring
pH 9.3AlkalineHot source · 98°CHigh silicaTop-decile alkaline
Composition fingerprint1.4 g/kg dissolved · Hypotonic
Na⁺95
Cl⁻54
CO₃²⁻21
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Warmingcold sensitivity
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
A sodium-led chloride spring with bicarbonate softness layered in, moderately mineralized and with noticeable body. It runs alkaline, giving the slippery feel that places it squarely in Japan's beauty-water family, and a generous 178 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother afterwards. The wellhead itself is among Japan's hottest natural sources. A notice posted at the facility says every bath here runs as aoyu — blue water — while adding that on some days the blue simply doesn't show.
Sampled at delivery pipe·Analyzed Jan 20, 2021·公益社団法人大分県薬剤師会·Cert no. 大薬検 第7R-21010008号
